Global shares surged on Wednesday, led by the biggest daily gains in Japan for seven years, helping lift the dollar and oil prices as the prospect of more stimulus from China soothed investors rattled by recent market turmoil.

Global shares surged on Wednesday, led by the biggest daily gains in Japan for seven years, helping lift the dollar and oil prices as the prospect of more stimulus from China soothed investors rattled by recent market turmoil.

The charge into stocks pushed yields on low-risk government bonds higher, with the rise exacerbated by the anticipation of auctions of German and U.S. 10-year debt later in the day.

European shares rose, with the pan-European FTSEurofirst 300 index .FTEU3 up more than 2 percent in early trade.

The stock market gains were sparked by a rally in Chinese shares on Tuesday, when weaker-than-expected August trade reinforced investors' expectations that Beijing would act to bolster slowing growth in the world's second-largest economy.

"The market will remain susceptible to a return of negativity until we see signs of some improvement in the original causes of weakness, which were predominantly Chinese growth concerns," he said.

Signals from Prime Minister Shinzo Abe that Japan will cut corporate taxes pushed the Nikkei 225 .N225 stock index up 7.7 percent, the most it has risen in a day since the depths of the global financial crisis in October 2008.

MSCI's broadest index of Asia-Pacific shares outside Japan .MIAPJ0000PUS also rallied hard, rising 3.3 percent, with gains across all the major indices.

Early indications from U.S. stock index futures ESc1 were that Wall Street would rally further later in the day.

Investors' increased appetite for risk saw the dollar firm against the safe-haven yen and the euro. The single European currency EUR= was down 0.2 percent at $1.1182 while the yen was 0.7 percent weaker at 120.66 per dollar.

Notable gainers in the currency markets were the Australian AUD= and New Zealand dollars NZD=. Both countries are exposed to Chinese growth.

RISK SENTIMENT

"I don't see an end to risk sentiment driving currencies any time soon," said Shusuke Yamada, chief Japan FX strategist at Bank of America Merrill Lynch in Tokyo.

"It all goes back to China, where opaqueness remains over its currency market, monetary policy and capital controls. The forex market is most on edge about a further possible devaluation of the yuan."

"Stabilization in Chinese equity markets has ... played an important role," ABN Amro analysts said.

German 10-year bond yields DE10YT=TWEB rose 3 basis points to 0.71 percent. German is due to sell 4 billion euros of the paper at around 0930 GMT.

U.S. 10-year Treasury yields US10YT=RR, which rose in New York on Tuesday with shares, headed higher still and were last up 3 bps at 2.22 percent. The Treasury Department will sell $21 billion of the notes on Wednesday.

"The environment for the auctions seems tricky amid the ongoing concerns about Chinese selling (of Treasuries). No one really knows how Chinese demand is going to behave and that's creating uncertainty here," said Commerzbank strategist Michael Leister.

Gold XAU= held above a three-week low, last trading at $1,120 an ounce, having fallen as low at $1,116.20 earlier this week.